Set the focus back to the search input when removing a tag

The idea is that if they removed a tag it is more that possible that
they want to continue editing tags.

web/static/numerus.js

@@ -423,7 +423,8 @@ class Tags extends HTMLDivElement {
                 button.textContent = '×';
                 button.addEventListener('click', (e) => {
                     e.stopPropagation();
-                    this.removeTag(tagText)
+                    this.removeTag(tagText);
+                    this.search.focus();
                 });
             }
         }